Belt-shifter.



No. 866,309. PATENTED SEPT. 17, 1907. A. ROBENTHAL. BELT SHIFTER.

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INVENTOI? AnuLPHRu ENTHAL ATTORNEYS UNITED STATES PATENT oEEIoE.

ADOLPII ROSENTHAL, 0F AUGUSTA, GEORGIA.

BELT-SHIFTER.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed April 4,1907. Serial No. 366,359.

To all ywhom it Vmay concern:

Be it known that l, AnoLrn RosENTI-IAL, a citizen of thc United States,and la resident of Augusta, in the county of Itichmond and State ofGeorgia, have invented an Improved Bolt-Shifter, of which the followingis a spcciiication.

My invention is a belt shifter adapted to be tripped and then to operateautomatically for stopping a machine when a certain movement thereof hasbeen made.

In the accompanying drawing I illustrate the invention as applied inconnection with the follower or piston of a hydraulic press in suchmanner that the driving belt is shifted from a fast pulley to a loose oridle pulley when the follower has made the movement required forcompressing or expelling the contents of the cylinder.

In the accompanying drawing, Figure l is a side view illustrating thedetails of arrangement and connection of my improved belt shifter with ahydraulic press. Fig. 2 is a plan view of the same parts. Fig. 3 is adetail section showing the device by which the trip chain of the beltshifter is connected with the follower of the press. Fig. 4 is a planview of the under side of the belt shifter proper. Fig. 5 is alongitudinal section taken in a plane at right angles to the view shownin Fig. 4.

In Figs. 1 and 2, the numeral l indicates the follower, 2 the piston,and 3 the cylinder of a hydraulic press. Upon the driving shaft 4 aremounted a fast or driving pulley 5, and a loose or idle pulley 6, and 7indicates a belt which is running on the fast pulley 5. The belt isembraced or received between the parallel arms or prongs 8, constitutinga part of the belt shifter proper. The other portions of the device area tube 9 having in opposite sides longitudinal slots 10 and 10E, thelatter being T-shaped as shown in Fig. 4. The belt arms or prongs 8 arerigidly but detachably connected with a rod 11 which slides in one endof the tube 9, its movement being limited by a screw or pin l2 thatslides in the slot l0 of the tube. In the other end of the tube 9 isarranged a block Il, and between it and the cap on the adjacent end ofthe tube is a spiral spring 13. A rod or stem 14 is attached to theblock Il, and projects through the cap on the end of the tube and isprovided with a cross handle 14a. The block llB is provided with alateral arm or pin l5, which projects through and is adapted to slide inthe T-shaped slot l()n of the tube 9. The tube 9 is held firmly butdetachably in horizontal position as indicated in Figs. l and 2, bymeans of brackets or arms 16 which are suitably connected with a fixedsupport, in this instance with vertical posts 17 supporting the cylinderof the press A chain 18 is attached to the under side of the follower lof the press, and its opposits end is connected with the pin or arm 15before described. Y A device IQ-see Figs. 4 and 5-is applied to theouter end of said pin to prevent accidental detachment of the chain,which is free to slide on the pin, as will be readily understood. InFig. 3, I illustrate the particular device preferred for attaching thechain to the follower l, the same consisting of a bracket 20 secured bya screw 2l to the follower and having a rod 22 supported in its pendentarms. The chain link or hook 23 is engaged with this rod and adapted toslide thereon.

It will now be understood that when it is desired to set the beltshifter' for tripping and operating automatically' at the required time,the operator seizes the handle I4 and by pulling on the sameconil'iresses the spring 13 in the tube 9 until the pin l5 in block 11Lstrikes the head of the T-slot l0, when the operator rotates the handleso as to cause the pin to enter one of the lateral or divergent portionsof the slot and thus engage the shoulder formed thereby. Suchengageinent is illustrated in Fig, 4, and it is obvious that the springwill be held compressed so long as such-engagement exists. Then theoperator pushes the rod ll into the tube 9 so that the prongs 8 carrythe belt 7 on to the driving pulley 5. The press then being put inoperation, the follower l rises, and when it has reached a certainheight, say that indicated by dotted lines Fig, l, the chain 18 ispulled and the pin l5 thereby drawn out of the lateral portion of theslot l0 and disengaged from the shoulder so that the spring instantlyforces the block 11 away from the capped end of the tube andsimultaneously pushes the rod ll further out of the tube so that theprongs or fingers 8 shift the belt 7 from the driving pulley 5 on to theidler 6, thereby arresting the operation of the press. The screw 12limits the movement of the rod 11, and the pin l5 likewise limits themovement of the block lliL in the tube, so that the spring cannot moveeither the block or rod too far. When the piston and follower of thepress dcscend, the chain I8 is slackened as before, and as indicated byfull lines Fig. l, and the belt shifter may then be again set as beforeand as indicated in Figs. 4 and 5, in readiness to be tripped as alreadyexplained.

The object in making the slot IO9L P-shaped is to enable the beltshifter to be applied on either side of a press or other machine. It ispossible to compress the spring and thus set the belt shifter withoutusing the stem and handle 14, 14, since the projecting arm or pin l5 maybe seized and serve as a means for `pulling the block l1B back againstthe tension of the spring and engaging the pin with the shoulder of theslot. It will be seen that the part 9 serves as a guide for the movableparts that it incloses; also, that the rod Il isin contact with theblock 11*l when the belt shifter is set ready to be tripped. The prongs8 are preferably screwed into the rod Il and may therefore be readilydetached. The screw l2 and the pin I5 are also detachable so that theparts of the belt shifter may be readily detached for convenience ofpacking or shipment, and as readily put together again.

The prongs 8 and the rod l1 constitute in themselves a means forshifting the belt from the fast to the loose pulley, and the reverse,whieh may be used independently of the other slidable parte arranged inthe tube 9. Sueh operation of the Shifting device proper is oftennecessary in operating eertnin nmehines, pnrtieulm'ly the elites ol'small presses to which the Shifter is shown applied. ln other words, itis often neeensnry to expel onlyY n small portion ol the contents of the('ylinder 3, und in such ense the belt is shifted from the driving tothe loose pulley without being tripped automatically. Such Shiftingnioveinent in neeoniplislnfd by the operator seizing the outer prong Heloso to the rofl ll :unl pulling or pushing its the ease Inny be.

lt will be understood that l design my invention for ztpplieation to anyforni of niuehine in whieh a belt requires to be shifted nun n drivingto a loose pulley, and the form of support o1' means for nttnr'hing theSinne to Snell machine. muy be varied nt will.

I elimini: n

1. The improved belt Shifter comprising a tube havingr :i lqhoulderedslot, a rod slidnble in said tube and provided with Interni prongs forreeeiving a beltl a block whieh is slidnble in tile other end of thetube, and pro- `.'ided with n lateral :lrm projecting through the shouiAdered Slot, :1 spring arranged between thc block and the ndjneent end ofthe tube, and nienns for Connecting the iid lateral arm with n movablepart of a lnaebine, suhstantially as shown and described.

2. The improved belt shifter comprising' u tube provided with oppositelengthwise slots, one of which is provided with :1 laterally divergentpoi-tion forming a shoulder, n rod which is slidnble in one end of thetubo and provided with means for engaging n belt, n pin attached toSnell rod und sliding' in one ol the slots of the tube, :l block whiehis slidnllle in the other end of the tube, und provided with n lateralarm werking in the shouldered slot, n spring pressing upon the block, :istem or rod connected with the block und extending from the udjneent endof the tube for use in compressing the spring und setting the beltshifter, und u deviee attached to the projet-ting arm of the bloek, und:idnpted for eenneeton with :l movable pnrt of a machine for tripping'the belt `#.hilter in the manner described.

H. The combination with a movable part of a machine, of the belt shiftercomprising n tubular guide, a port sliding therein and provided withmeans for engaging' u bell', n spring arranged in the guide and adaptedto net on the Suid device for shifting it when tripped, a trip nrniadopted for detachable engagement with tbe tubular guide. :1nd means forconneeling the arm with the lnovable purl of the machine, :1s shown anddescribed,

A DOLIII ROSENTIIA L.

Witnesses Sonore C. KnMUN, Anus W. HART

